GNGTS 2013 - Atti del 32° Convegno Nazionale

presence of such a wide and deep “gravity graben”, suggest a magnitude value much larger than the 2009 earthquake (Mw=6.3). Acknowledgements. The Authors wish to thank Valeria Eulilli, Fernando Ferri and Luca M. Puzzilli for providing the geophysical investigations, and Leonello Serva for his valuable suggestions in the paleoseismic interpretation of the stratigraphic log. References Bagnaia R., D’Epifanio A. and Sylos Labini S.; 1992: Aquila and subaequan basins: an example of Quaternary evolution in Central Apennines, Italy. Quaternaria Nova, II , 187-209 (preprint spec. number 1, 1-23- 989). Bertini T. and Bosi C.; 1993; La tettonica quaternaria nella conca di Fossa (L’Aquila) . Il Quaternario, 6 , 293-314. Fig. 3 – (A) View of the fault zone exposed in the eastern wall. (B) Stratigraphic sketch of the fault zone exposed in the eastern wall of the San Demetrio trench. Levels 4 and 10 are colluvial wedges. The dashed box locates Fig. 3C. (C) Close-up view of the upper colluvial wedges exposed in the eastern wall of the San Demetrio trench. 32 GNGTS 2013 S essione 1.1